Refactor test script for optimality conditions, cosmetic changes

[lostella]

No description provided.

[codecov]

Codecov Report

Merging #127 (1503683) into master (3fd357b) will increase coverage by 0.16%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #127      +/-   ##
==========================================
+ Coverage   87.40%   87.57%   +0.16%     
==========================================
  Files          77       77              
  Lines        2406     2406              
==========================================
+ Hits         2103     2107       +4     
+ Misses        303      299       -4     

Impacted Files	Coverage Δ
src/functions/indSimplex.jl	91.48% <0.00%> (+8.51%)	⬆️

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